CN108453261A - A kind of device that there is the laser gain material of preheating and slow cooling function to manufacture - Google Patents
A kind of device that there is the laser gain material of preheating and slow cooling function to manufacture Download PDFInfo
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- CN108453261A CN108453261A CN201810669516.3A CN201810669516A CN108453261A CN 108453261 A CN108453261 A CN 108453261A CN 201810669516 A CN201810669516 A CN 201810669516A CN 108453261 A CN108453261 A CN 108453261A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/362—Process control of energy beam parameters for preheating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/44—Radiation means characterised by the configuration of the radiation means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a kind of devices that there is the laser gain material of preheating and slow cooling function to manufacture.The device includes laser, light chopper and focusing system and the workbench for placing matrix, energy beam splitting occurs in light chopper and focusing system and forms at least two-stage energy for the laser beam of the laser output, wherein first order energy is processed to cladding, is finally radiated at the center that corresponding solid hot spot on matrix is located at whole hot spot；Energy corresponding hot spot in the second level is the ring-shaped light spot around the center spot, to realize preheating and slow cooling.The device realizes laser melting coating, substrate preheating and cladding layer slow cooling simultaneously using same laser heat source, can effectively reduce the temperature gradient in cladding process, reduces internal stress, inhibits crack defect to generate, and do not limited by size of formed part and shape.
Description
Technical field
The invention belongs to material increasing fields, are related to a kind of device of laser gain material manufacture.
Background technology
Laser gain material manufacturing technology is a kind of advanced laser machining forming for taking into account Accurate Shaping and high-performance forming needs
Manufacturing technology, it includes special using synchronous powder feeding system as the laser solid forming technology of technical characteristics and by major technique of powder bed
The selective laser melting process of sign.Wherein, laser solid forming technology can realize the fast without mould of high-performance densified metal component
Fast nearly forming, and forming dimension is substantially unrestricted can also realize the arbitrary compound and terraced of multiple material on same component
Spend structure manufacture.
Due to laser energy density height, quickly heats and be quickly cooled down and rapidoprint can be made to produce in laser gain material manufacturing process
Raw excessive internal stress easily causes drip molding cracking.In order to control the thermal stress in forming process, preheating slow cooling skill is introduced
Art, the preheating of matrix and the slow cooling of cladding layer can effectively reduce the temperature gradient in forming process, be shaped to reduce
The thermal stress generated in journey inhibits crack defect to generate, and is of great significance to obtaining high mass components.
Currently, common substrate preheating method is integrally to heat base using external heat sources such as hot water radiation wire or electromagnetic induction
Body.In technical paper《Substrate preheating repairs laser deposition the influence of GH4169 alloy properties》Middle author investigation discovery, matrix
Entirety is preheated to 300 DEG C, and the residual stress of GH4169 alloy samples has apparent reduction.Matrix is integrally heated to reducing thermal stress
Tool has certain effect, but increasing material manufacturing is that successively stack shaping will cause preheating temperature uneven with the increase of the deposition number of plies
It is even；In addition there are also problems in increasing material manufacturing integration of equipments for preheating device.
In order to avoid the adverse effect that matrix entirety heating tape is come, current solution mainly increases independent heat source
With processing laser synchronization movement, preheating slow cooling is carried out for (movement locus processed along cladding) part.Such as：
Chinese patent literature CN103774137A realizes laser melting and coating process using multi-laser, wherein First laser
Device is used for substrate preheating, and second (or more) laser is processed for cladding, and third platform is for cladding layer Slow cooling or not
The natural cooling with laser, this method can effectively control crack defect and gas hole defect in cladding layer, but cost of implementation
Height, and complex structural designs.
Chinese patent literature CN102383126A carries out laser melting coating using two lasers, wherein a laser is used
It is processed in cladding, using beam splitter separating one in front and one in back two beam laser in another laser, (irradiation position is located at cladding
Process the front and back of hot spot), preceding laser is used for substrate preheating, and rear laser is used to after carrying out the coating of formation be heat-treated.
The program can only can not be applicable in the laser melting coating with corner structure, poor universality in straight line cladding process effectively.
Invention content
In order to reduce the thermal stress generated in laser gain material manufacturing process, forming cracking, the present invention be inhibited to propose a kind of tool
There is the device that the laser gain material of preheating and slow cooling function manufactures, versatility is good, and working efficiency is higher.
The solution of the present invention is as follows：
The device includes laser, light chopper and focusing system and the workbench for placing matrix, the laser
The laser beam of output occur in light chopper and focusing system energy beam splitting formed two-stage energy, wherein first order energy to
Cladding is processed, and is finally radiated at the center that corresponding solid hot spot on matrix is located at whole hot spot, is denoted as center spot；The second level
The corresponding hot spot of energy is the ring-shaped light spot around the center spot, to realize preheating and slow cooling.
In this way, in laser processing procedure, interior solid hot spot is into row metal cladding, the preceding part of outer annular hot spot
(front region relative to interior solid hot spot) realizes the preheating to matrix, and rear part is (after interior solid hot spot
Square region) realize cladding layer slow cooling.
Based on above scheme, the present invention has also further made following optimization：
A kind of preferable structure of light chopper and focusing system is：Beam splitter including taper, generally loop configuration
Speculum and focus lamp for the laser beam focus to transmiting the beam splitter；The beam splitter, speculum and focus lamp
Coaxial with incident laser beam, the reflecting surface of speculum is curved reflecting surface, and the laser beam of laser output is incident on beam splitter
On be divided into transmitted light beam and the reflected beams, transmitted light beam ultimately forms the center spot, and the reflected beams are again through the speculum
Center spot periphery is reflexed to, the ring-shaped light spot is formed.Certainly, light chopper and focusing system are also not necessarily limited to a kind of this knot
Structure, only other structures can relative complex or cost of implementation it is higher.
Further, beam splitter is cone, and taper is 90 degree；Correspondingly, the transmitted light beam ultimately form it is circular
Center spot.
Further, speculum is also configured with position adjusting mechanism, the angle for adjusting curved reflecting surface, to change
The size of ring-shaped light spot.
Further, speculum integrally forms the loop configuration, the position adjusting mechanism energy by multiple discrete components
Enough angles for independently adjusting each section of curved reflecting surface.
Further, beam splitter realizes the beam splitting of transmission/reflection/angle, such as the material of beam splitter by the way of surface coating
It is preferred that K9 glass or quartz, and surface coating, to realize that fractional transmission, part reflect.
Laser is optical fiber laser (the continuous multimode laser of high power that can be transmitted by optical fiber).
First order energy and the ratio of second level energy can be adjusted by the filming parameter on beam splitter surface, root
Factually border technological effect is configured.Optically easy to implement is 50%：50%.
The technique effect of the present invention：
1, the present invention uses same incident light source, by the design of optical system, formed preheating slow cooling laser as outer shroud,
The Energy distribution centered on laser is processed in cladding, realizes the integration of cladding processing, substrate preheating and slow cooling, not only more
Significantly decrease temperature gradient and thermal stress, it is suppressed that crack defect generates, and the shortcomings that avoid lineal layout, not by
Increasing material manufacturing size of formed part and shape limitation.
Beam of laser, is divided by a kind of light chopper and focusing system that 2, the present invention provides using beam splitter and speculum
Outer annular laser and interior solid laser two beam laser, and taper and parameters of film, speculum by adjusting beam splitter
Position and angle can easily realize the ring-shaped light spot of different sizes and power distribution.
Description of the drawings
Fig. 1 is the schematic diagram of increasing material manufacturing system.
Fig. 2 is light chopper and the light channel structure schematic diagram of focusing system.
Fig. 3 is the spot projection schematic diagram of laser gain material manufacturing device.
Fig. 4 is laser gain material manufacturing process schematic diagram.
Fig. 5 be drip molding thermal field cloud atlas comparison signal (left figure correspond to not plus preheating slow cooling laser, right figure correspond to increase
Preheating slow cooling laser preheating slow cooling laser is added).
Fig. 6 is that (left figure does not correspond to not plus preheating slow cooling laser, and right figure corresponds to for the comparison signal of drip molding stress field cloud atlas
Increase preheating slow cooling laser preheating slow cooling laser).
Specific implementation mode
Below in conjunction with the accompanying drawings, the present invention is described in further detail by specific embodiment.
As depicted in figs. 1 and 2, whole system include laser 1, beam splitter 2, speculum 3, focus lamp 4, powder feed system 5,
Matrix 6 and workbench.Matrix 6 is placed on the table, and positioned at the lower section of focus lamp 4 and powder feed system 5；Powder feed system 5 is used
In the device realized during increasing material manufacturing with cladding laser coaxial powder feeding (for entire increasing material manufacturing system, powder feeding
The installation site of system 5 is not limited to specific location shown in FIG. 1).
Laser 1 is optical fiber laser, wavelength 1060nm, minimum light spot a diameter of 0.4mm, peak power output 4KW.
Beam splitter 2 is cone, and beam splitter material is K9 glass or quartz, and surface coating, splitting ratio can be by beam splitter 2
Parameters of film is adjusted.By setting the parameters of film of beam splitter 2, laser 1 can be exported laser L1 and be beamed into watt level
Different laser beam L2 and L3, wherein high-power laser beam L2 forms cladding transmitted through beam splitter 2 and processes laser, and small-power swashs
Light beam L3 forms the gentle cold laser of preheating through beam splitter 2 and speculum 3.
Speculum 3 is loop configuration, and reflecting surface is arc, so it is annular beam that reflection, which focuses on 6 surface of matrix,.It can
High reflectance copper film layer, and allocation position regulating mechanism are plated in curved reflecting surface, speculum can be carried out around some point or axis
Rotation.In this way, the angle of reflected light is can be adjusted according to the needs, to change the position of annular beam focus point distance center point
It sets.Further, the curved reflecting surface angle is adjusted for convenience, and the integral ring junction of multiple discrete component groups may be used
Structure.
By the structure adjusting of 3 position of parameters of film and speculum, angle to beam splitter 2, different sizes may be implemented
With the ring-shaped light spot of power distribution.When different sizes and the annular beam of power distribution are manufactured for laser gain material, it can play
The effect of slow cooling is preheated, it is variant only to preheat slow cooling effect.
Such as：
1 output power of laser is the laser beam L1 of 1700W, and laser beam L1 is incident on the conical surface of beam splitter 2, beam splitter 2
By laser beam, L1 points are laser beam L2 and laser beam L3, and wherein laser beam L2 power is 1500W, and laser beam L3 power is 200W.
Laser beam L2 line focuses mirror 4 focuses on matrix 6, forms cladding processing hot spot (circular solids hot spot, a diameter of 2mm)；Laser
Beam L3 is reflexed to through speculum 3 on matrix 6, forms the gentle cold light spot (ring-shaped light spot, internal diameter 3mm, outer diameter 5mm) of preheating,
As shown in Figure 3.
Laser gain material manufacturing process is as shown in figure 4, matrix 6 and formed powder are all made of 304L stainless steels, laser scanning speed
Degree is 6mm/s, and the scan path shown in Fig. 4 shapes four single layer 304L stainless steel cladding layers.
By the Experimental comparison (Fig. 5, Fig. 6) of drip molding thermal field cloud atlas, stress field cloud atlas, phase of the present invention is further demonstrated
Than the prior art, temperature gradient can be effectively reduced in cladding process, reduces the thermal stress in forming process, inhibit crack defect
It generates.
Claims (7)
1. a kind of device that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that：Become including laser, light path
It changes and focusing system and the workbench for placing matrix, the laser beam of the laser output is in light chopper and focusing system
Middle generation energy beam splitting forms two-stage energy, and wherein first order energy is processed to cladding, is finally radiated at corresponding on matrix
Solid hot spot is located at the center of whole hot spot, is denoted as center spot；Energy corresponding hot spot in the second level is around the center light
The ring-shaped light spot of spot, to realize preheating and slow cooling.
2. the device according to claim 1 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that：Institute
It states light chopper and focusing system includes the beam splitter of taper, the generally speculum of loop configuration and for transmiting described point
The focus lamp of the laser beam focus of Shu Jing, the beam splitter, speculum and focus lamp and incident laser beam are coaxial, speculum
Reflecting surface is curved reflecting surface, and the laser beam of laser output, which is incident on beam splitter, is divided into transmitted light beam and the reflected beams, thoroughly
Irradiating light beam ultimately forms the center spot, and the reflected beams reflex to center spot periphery through the speculum again, described in formation
Ring-shaped light spot.
3. the device according to claim 2 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that：Institute
It is cone to state beam splitter, and taper is 90 degree；Correspondingly, the transmitted light beam ultimately forms circular center spot.
4. the device according to claim 2 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that：Institute
It states speculum and is also configured with position adjusting mechanism, the angle for adjusting curved reflecting surface, to change the size of ring-shaped light spot.
5. the device according to claim 4 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that：Institute
It states speculum and integrally forms the loop configuration by multiple discrete components, the position adjusting mechanism can be adjusted independently respectively
The angle of section curved reflecting surface.
6. the device according to claim 2 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that：Institute
The material of beam splitter is stated as K9 glass or quartz, and surface coating, to realize that fractional transmission, part reflect.
7. the device according to claim 1 that there is the laser gain material of preheating and slow cooling function to manufacture, it is characterised in that：Institute
It is optical fiber laser to state laser.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810669516.3A CN108453261B (en) | 2018-06-21 | 2018-06-21 | Laser additive manufacturing device with preheating and slow cooling functions |
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|---|---|---|---|
| CN201810669516.3A CN108453261B (en) | 2018-06-21 | 2018-06-21 | Laser additive manufacturing device with preheating and slow cooling functions |
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| CN108453261A true CN108453261A (en) | 2018-08-28 |
| CN108453261B CN108453261B (en) | 2023-08-15 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109663915A (en) * | 2018-12-28 | 2019-04-23 | 淮阴工学院 | A kind of laser gain material manufacture crack stopper |
| CN109852967A (en) * | 2019-04-17 | 2019-06-07 | 中国人民解放军军事科学院国防科技创新研究院 | Pencil stream Laser Melting Deposition increasing material manufacturing method and its laser Machining head that uses |
| CN110976865A (en) * | 2019-12-19 | 2020-04-10 | 西安增材制造国家研究院有限公司 | Solidification structure and forming stress regulation and control method for laser coaxial powder feeding additive manufacturing |
| CN111058030A (en) * | 2019-12-20 | 2020-04-24 | 东南大学 | Preheating and tempering laser cladding head with beam splitter and processing method |
| CN111058029A (en) * | 2019-12-20 | 2020-04-24 | 东南大学 | Laser cladding head capable of simultaneously performing preheating tempering and laser cladding method thereof |
| CN111810863A (en) * | 2020-06-23 | 2020-10-23 | 七海测量技术（深圳）有限公司 | Visual light source device |
| CN112719304A (en) * | 2020-12-29 | 2021-04-30 | 武汉惟景三维科技有限公司 | Preheating device for selective laser sintering |
| CN113369694A (en) * | 2021-04-25 | 2021-09-10 | 西安交通大学 | Double-beam coupling laser additive forming method and device |
| CN114717547A (en) * | 2022-03-07 | 2022-07-08 | 郑州大学 | Laser cladding light path system capable of realizing preheating and remelting in cladding process and working process thereof |
| CN115255399A (en) * | 2022-08-05 | 2022-11-01 | 西安交通大学 | 3D printing device and method for eliminating printing defects by utilizing micro-area synchronous heat treatment |
| WO2023077282A1 (en) * | 2021-11-02 | 2023-05-11 | 广东汉邦激光科技有限公司 | Laser 3d printing method and laser 3d printing device |
| CN116837378A (en) * | 2023-08-29 | 2023-10-03 | 山东镭研激光科技有限公司 | Laser cladding feeding device |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109663915B (en) * | 2018-12-28 | 2024-03-26 | 淮阴工学院 | Anti-cracking method for laser additive manufacturing |
| CN109663915A (en) * | 2018-12-28 | 2019-04-23 | 淮阴工学院 | A kind of laser gain material manufacture crack stopper |
| CN109852967A (en) * | 2019-04-17 | 2019-06-07 | 中国人民解放军军事科学院国防科技创新研究院 | Pencil stream Laser Melting Deposition increasing material manufacturing method and its laser Machining head that uses |
| CN110976865B (en) * | 2019-12-19 | 2022-08-12 | 西安增材制造国家研究院有限公司 | Solidification structure and forming stress regulation and control method for laser coaxial powder feeding additive manufacturing |
| CN110976865A (en) * | 2019-12-19 | 2020-04-10 | 西安增材制造国家研究院有限公司 | Solidification structure and forming stress regulation and control method for laser coaxial powder feeding additive manufacturing |
| CN111058030A (en) * | 2019-12-20 | 2020-04-24 | 东南大学 | Preheating and tempering laser cladding head with beam splitter and processing method |
| CN111058029A (en) * | 2019-12-20 | 2020-04-24 | 东南大学 | Laser cladding head capable of simultaneously performing preheating tempering and laser cladding method thereof |
| CN111810863A (en) * | 2020-06-23 | 2020-10-23 | 七海测量技术（深圳）有限公司 | Visual light source device |
| CN112719304A (en) * | 2020-12-29 | 2021-04-30 | 武汉惟景三维科技有限公司 | Preheating device for selective laser sintering |
| CN113369694B (en) * | 2021-04-25 | 2022-06-07 | 西安交通大学 | Double-beam coupling laser additive forming method and device |
| CN113369694A (en) * | 2021-04-25 | 2021-09-10 | 西安交通大学 | Double-beam coupling laser additive forming method and device |
| WO2023077282A1 (en) * | 2021-11-02 | 2023-05-11 | 广东汉邦激光科技有限公司 | Laser 3d printing method and laser 3d printing device |
| CN114717547A (en) * | 2022-03-07 | 2022-07-08 | 郑州大学 | Laser cladding light path system capable of realizing preheating and remelting in cladding process and working process thereof |
| CN115255399A (en) * | 2022-08-05 | 2022-11-01 | 西安交通大学 | 3D printing device and method for eliminating printing defects by utilizing micro-area synchronous heat treatment |
| CN116837378A (en) * | 2023-08-29 | 2023-10-03 | 山东镭研激光科技有限公司 | Laser cladding feeding device |
| CN116837378B (en) * | 2023-08-29 | 2023-11-17 | 山东镭研激光科技有限公司 | Laser cladding feeding device |
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